# Claude 3.5 Sonnet vs Gemini 3.5 Flash

> Gemini 3.5 Flash is the stronger model overall, scoring 54.1 to 34.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-5-sonnet-vs-gemini-3-5-flash
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Claude 3.5 Sonnet scores higher in 1 category and Gemini 3.5 Flash in 9 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 3.5 Flash leads 60.5 to 18.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 8.5% for Claude 3.5 Sonnet and 95.6% for Gemini 3.5 Flash.

## Snapshot

| | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 34.4 | 54.1 |
| Rank | 225 | 29 |
| Context | — | 1.05M |
| Input $/M | — | $1.50 |
| Output $/M | — | $9 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3.5 Sonnet: 39.5 (#145)
- Gemini 3.5 Flash: 49.1 (#46)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| WeirdML | 40% | 62.6% |
| LMArena Coding | 1343 | 1492 |
| SWE-bench Verified | — | 79.3% |
| DeepSWE | — | 37.4% |
| Aider Polyglot | 51.6% | — |
| LMArena WebDev | — | 1499 |
| SciCode | — | 53.1% |
| GSO | 4.6% | — |
| BigCodeBench Instruct | 46.8% | — |
| LiveBench Coding | 67.1% | — |
| BigCodeBench Complete | 58.6% | — |
| CadEval | 48% | — |
| ALE-Bench | — | 911.02 |
| HumanEval+ | 81.7% | — |
| MBPP+ | 74.3% | — |

## Agentic & Tool Use

- Claude 3.5 Sonnet: 32.1 (#61)
- Gemini 3.5 Flash: 24.8 (#107)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| APEX-Agents | — | 27.5% |
| TheAgentCompany | 24% | — |
| Cybench | 17.5% | — |
| BALROG | 32.6% | — |
| GBAEval | — | 6.7% |
| GDP.pdf | — | 14% |
| METR Time Horizons | 45.2% | — |
| Vending-Bench 2 | — | 5,396 |

## Reasoning

- Claude 3.5 Sonnet: 22.5 (#176)
- Gemini 3.5 Flash: 62.7 (#16)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| SimpleBench | 41.4% | 76.7% |
| EnigmaEval | 0.9% | 25.4% |
| LMArena Hard Prompts | 1305 | 1488 |
| DTBench | 67.8% | 94.7% |
| Epoch Capabilities Index | 133.55 | 154.55 |
| ForecastBench | 60.7 | 59 |
| ARC-AGI-2 | — | 72.1% |
| NYT Connections (extended) | — | 92.6% |
| ARC-AGI-1 | — | 92.5% |
| CritPt | — | 13.1% |
| Chess Puzzles | — | 50% |
| EBR-Bench | — | 4.8% |
| LiveBench Reasoning | 56.7% | — |
| Mystery Game Puzzles | — | 32% |
| LiveBench Data Analysis | 55% | — |
| LMCA | — | 47.1% |
| Surface Evolver Bench | — | 58.1% |
| LiveBench | 59% | — |

## Math

- Claude 3.5 Sonnet: 18.0 (#282)
- Gemini 3.5 Flash: 60.5 (#30)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.5% | 95.6% |
| LMArena Math | 1306 | 1502 |
| FrontierMath (Feb 2025 set) | 2.1% | 39% |
| FrontierMath Tier 4 (v1) | 0% | 14.6% |
| FrontierMath (Tiers 1-3) | — | 62.8% |
| FrontierMath Tier 4 | — | 26.8% |
| MathArena Final-Answer Competitions | — | 76.3% |
| ProofBench | — | 31% |
| Omni-MATH | 27.6% | — |
| LiveBench Math | 52.3% | — |
| MATH Level 5 | 56.9% | — |

## Knowledge

- Claude 3.5 Sonnet: 28.5 (#236)
- Gemini 3.5 Flash: 66.3 (#10)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| GPQA Diamond | 55.3% | 92.8% |
| LMArena Expert | 1264 | 1493 |
| Humanity's Last Exam | 4.1% | — |
| SimpleQA Verified | — | 66.2% |
| MMLU-Pro | 77.7% | — |
| Confabulations | 19.9% | — |
| GPQA (HELM) | 56.5% | — |
| MMLU | 87.3% | — |

## Multimodal

- Claude 3.5 Sonnet: 26.0 (#115)
- Gemini 3.5 Flash: 45.7 (#13)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| LMArena Vision | 1125 | 1311 |
| Video-MME | 60% | — |
| GeoBench | 62% | — |
| VPCT | 33% | — |
| Blueprint-Bench 2 | — | 33.6% |
| LMArena Document | — | 1463 |

## Multilingual

- Claude 3.5 Sonnet: 43.4 (#180)
- Gemini 3.5 Flash: 57.1 (#12)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1283 | 1475 |
| LMArena Chinese | 1271 | 1525 |
| LMArena French | 1304 | 1490 |
| LMArena German | 1297 | 1500 |
| LMArena Japanese | 1234 | 1481 |
| LMArena Korean | 1200 | 1453 |
| LMArena Russian | 1305 | 1491 |
| LMArena Spanish | 1289 | 1478 |

## Instruction Following

- Claude 3.5 Sonnet: 69.0 (#177)
- Gemini 3.5 Flash: 77.2 (#29)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1297 | 1466 |
| LiveBench Instruction Following | 69.3% | — |
| IFEval | 85.5% | — |

## Long Context

- Claude 3.5 Sonnet: 39.9 (#162)
- Gemini 3.5 Flash: 45.3 (#39)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1311 | 1481 |

## Writing & Preference

- Claude 3.5 Sonnet: 53.0 (#159)
- Gemini 3.5 Flash: 65.5 (#46)

| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash |
|---|---|---|
| LMArena Text | 1298 | 1481 |
| LMArena Creative Writing | 1292 | 1467 |
| LMArena Multi-Turn | 1326 | 1482 |
| Short-Story Creative Writing | 80.3% | — |
| EQ-Bench Creative Writing | 1451 | — |
| WildBench | 79.2% | — |
| EQ-Bench 4 | — | 1087 |
| LiveBench Language | 53.8% | — |

## FAQ

### Is Claude 3.5 Sonnet better than Gemini 3.5 Flash?

Gemini 3.5 Flash is the stronger model overall, scoring 54.1 to 34.4 on the Noometry Index.

### Is Claude 3.5 Sonnet or Gemini 3.5 Flash better for coding?

Gemini 3.5 Flash scores higher on coding benchmarks: 49.1 versus 39.5 in the Noometry coding category.

### How many benchmarks do Claude 3.5 Sonnet and Gemini 3.5 Flash share?

28 benchmarks have published results for both models. Claude 3.5 Sonnet has 60 scored results on Noometry and Gemini 3.5 Flash has 54.